No need to restate the obvious here but I'll bite, this is a
DISNEY cruise with LOTS of kids. If you want something where there is much less opportunity for kids to spoil your adult fun then pick an adult oriented cruise line. I'm wondering why did you pick
DCL in the first place? Likely because you knew it would be awesome for your kids? The crew does the best they can to keep adult areas "off limits" but it would be almost impossible to fully enforce a STRICT "get out of here kid" policy. IMO this is like buying a home in near an airport then complaining about the noise after you move in.